When the TARDIS lands 50 years after its first visit to Peladon, the Doctor and Sarah Jane discover a troubled planet ruled by the late king's daughter. Peladon is at the center of a war - and the Galactic Federation desperately needs a mineral found in the mines. But why is the ghost of Agreddor killing miners, and why can't everyone be trusted? Queen Thalira needs the Doctor's help to find out.

A mysterious UFO lands on Earth. The Axons have arrived, desperate for help and eager to offer in return an exciting gift - axonite, potentially the most powerful substance man has ever seen.

Arrested after the events at Devil's End, the Master has been incarcerated at a top security prison on a remote island off the south coast of England. When the Doctor and Jo Grant pay a visit to their old enemy, they find him a reformed character. But can the spate of mysterious shipping accidents and garbled reports of sea monsters in the local area really be a coincidence? The Doctor soon finds himself pitted against the Sea Devils, an ancient race...

The Earth is in terrible danger! The Master is back with an evil scheme to destroy humanity and silence the Doctor forever. His plan: To awaken the awesome power of the Nestene, a ruthlessly aggressive alien life form. Once mixed with plastic, they will form into faceless automatons, a willing army of destruction easily controlled by the evil Time Lord himself. This is the terrible threat now facing the Earth, the terror of the Autons.